Definition of osmite in US English:

osmite

noun

Chemistry
rare
  • A salt obtained following reduction of osmic acid, or derived from a lower oxide of osmium; specifically a salt of the anion [OsO₂(OH)₄]2−.

Origin

Mid 19th century. From French osmite from osm- (in osmium) + -ite.

Pronunciation

osmite

/ˈɒzmʌɪt/